AS 1289.4.1.1:2019 pdf free
AS 1289.4.1.1:2019 pdf free.Methods of testing soils for engineering purposes
The procedure shall be as follows:
(a) Dry the bulk sample obtained in accordance with the procedure prescribed in AS 1289.1.1 for the preparation of disturbed samples for testing in the oven at 105°C to 110 °C.
(b) Allow the sample to cool and determine and record its mass (m1) to the nearest 0.001 g.
(c) Crush all aggregations, other than discrete particles, and sieve over the 9.5 mm sieve.
NOTE 1 Soils containing sulfides: Soils containing sulfides have been found to give high results by this method. The sulfides can be destroyed prior to pulverizing by the addition of dilute (0.5M) sulfuric acid. Add acid until no further evolution of hydrogen sulfide occurs. The sample should be dried prior to pulverizing.
NOTE 2 Soils containing chlorides: Soils containing chlorides have been found to give high results using this method. The chlorides may be removed prior to pulverizing by washing the soil with distilled water until no turbidity is obtained when a drop of the washing water is tested with silver nitrate solution. Alternatively, the effect of chlorides on the determination can be partly eliminated by using concentrated sulfuric acid in which silver sulfate has been dissolved in place of the concentrated sulfuric acid specified in Clause 3(b). If the molecular equivalent ratio of chloride to carbon does not exceed unity, 25 g of silver sulfate per litre of sulfuric acid will be sufficient to precipitate the chloride. The sample should be dried prior to pulverizing.
(d) Record the mass (m2) to the nearest 0.001 g of material passing the sieve.
(e) Ensure that there is no loss of fines through these and all subsequent operations.
(f) Divide the material passing the 9.5 mm sieve by successive riffling on the 13 mm divider or by quartering to produce a sample of about 100 g.
(g) Pulverize this sample so that it passes the 425 μum sieve, and then subdivide the sample by riffling on the 7 mm divider until two test portions about 5 g each are obtained. Throughout this and any subsequent operation, thoroughly mix the material available for any division and take precautions to avoid segregation during riffling.AS 1289.4.1.1 pdf free download.
